content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one or more
   *  contributor license agreements.  See the NOTICE file distributed with
   *  this work for additional information regarding copyright ownership.
   *  The ASF licenses this file to You under the Apache License, Version 2.0
   *  (the "License"); you may not use this file except in compliance with
   *  the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS,
   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   */
  
  /**
  * @author Vladimir N. Molotkov, Stepan M. Mishura
  */
  
  package android.org.apache.harmony.security.asn1;
  
  import java.io.IOException;
  import java.io.UnsupportedEncodingException;
  
  
  /**
   * This class is the super class for all string ASN.1 types
   * 
   * @see http://asn1.elibel.tm.fr/en/standards/index.htm
   */
  
  public abstract class ASN1StringType extends ASN1Type {
  
      // TODO: what about defining them as separate classes?  
      // TODO: check decoded/encoded characters
      public static final ASN1StringType BMPSTRING = new ASN1StringType(
              TAG_BMPSTRING) {
      };
  
      public static final ASN1StringType IA5STRING = new ASN1StringType(
              TAG_IA5STRING) {
      };
  
      public static final ASN1StringType GENERALSTRING = new ASN1StringType(
              TAG_GENERALSTRING) {
      };
  
      public static final ASN1StringType PRINTABLESTRING = new ASN1StringType(
              TAG_PRINTABLESTRING) {
      };
  
      public static final ASN1StringType TELETEXSTRING = new ASN1StringType(
              TAG_TELETEXSTRING) {
      };
  
      public static final ASN1StringType UNIVERSALSTRING = new ASN1StringType(
              TAG_UNIVERSALSTRING) {
      };
  
      public static final ASN1StringType UTF8STRING = new ASN1StringType(
              TAG_UTF8STRING) {
  
          public Object getDecodedObject(BerInputStream in) throws IOException {
              return new String(in.buffer, in.contentOffset, in.length, "UTF-8"); //$NON-NLS-1$
          }
  
          public void setEncodingContent(BerOutputStream out) {
  
              try {
                  byte[] bytes = ((String) out.content).getBytes("UTF-8"); //$NON-NLS-1$
                  out.content = bytes;
                  out.length = bytes.length;
              } catch (UnsupportedEncodingException e) {
                  throw new RuntimeException(e.getMessage());
              }
          }
      };
  
      public ASN1StringType(int tagNumber) {
          super(tagNumber);
      }
  
      //
      //
      // Decode
      //
      //
  
      /**
       * Tests provided identifier.
       * 
       * @param identifier -
       *            identifier to be verified
       * @return - true if identifier correspond to primitive or constructed
       *         identifier of this ASN.1 string type, otherwise false
       */
      public final boolean checkTag(int identifier) {
          return this.id == identifier || this.constrId == identifier;
      }
  
      public Object decode(BerInputStream in) throws IOException {
  
          in.readString(this);
          
          if (in.isVerify) {
              return null;
          }
          return getDecodedObject(in);
      }
  
      /**
       * Extracts String object from BER input stream.
       *
       * @param in - BER input stream
       * @return java.land.String object
       */
      public Object getDecodedObject(BerInputStream in) throws IOException {
          /* To ensure we get the correct encoding on non-ASCII platforms, specify
             that we wish to convert from ASCII to the default platform encoding */
          return new String(in.buffer, in.contentOffset, in.length, "ISO-8859-1");
      }
  
      //
      //
      // Encode
      //
      //
      
      public void encodeASN(BerOutputStream out) {
          out.encodeTag(id);
          encodeContent(out);
      }
  
      public void encodeContent(BerOutputStream out) {
          out.encodeString();
      }
  
      public void setEncodingContent(BerOutputStream out) {
          try {
              byte[] bytes = ((String) out.content).getBytes("UTF-8"); //$NON-NLS-1$
              out.content = bytes;
              out.length = bytes.length;
          } catch (UnsupportedEncodingException e) {
              throw new RuntimeException(e.getMessage());
          }
      }
  }
  
  
  
  